Shure is an ongoing concern so there will be no Shure cartridges unless they decide to make them. Back in the heyday of LPs the production volume was certainly huge. With volume comes supply chain control and internal control, both necessary for high quality. I don't know what happened near the end, but my Shure cartridges, including the M92ED and several V15 models, were very good. Not as good as my Ortofons that came later. If you don't have volume, you're a boutique manufacturer and have to work harder and spend more to maintain quality. If you don't have volume some parts will be impossible to obtain because nobody will get out of bed in the morning to bother with a tiny money-losing order. Keep in mind that almost everything to do with making a cartridge and stylus is fine skilled hand work under a microscope. You won't find people to do that work cheaply these days.